Derby doubler or sliver-lap machine



Aug. 20, 1929.

G. RIDING A DERBY DOUBLER OR SLIVER LAP- MACHINE Filed March 22, 1928 2 Sheefs-Sheet Aug. 20, 1929. A. 5. mm 1,125,018

DERBY DOUBLER OR SLIVER LAP MACHINE 7 Filed March 22, 1928 2 Sheets-Sheet 2 INYENTOR.

Patented Aug. 20, 1929.

UNITED STATES ARTHUR GARRETT RIDING, OF HASHINGDEN, ENGLAND.

DERBY DOUBLER OR SLIVER-LA'P MACHINE Application filed March 22, 1928, Serial No. 263,714, and in Great Britain April 13, 1927.

This invention relates to machines for forming laps in the preparation of cotton for spinning known as Derby doublers and sliver-lap machines of the type having.

means to prevent the slivers crowding upon or over riding one another in their passage through the machine.

The invention comprises the application of a dividing or separating roller below the delivery end of the guide plate or board and the calender rollers with annular discs or collars of thin material projecting up ward through the plate or board to divide or separate the slivers and deliver them separately to the calender rollers.

The invention will be described with reference to the accompanying drawings.

Fig. 1 is a sectional elevation of a Derby doubler showing the invention applied thereto.

Fig. 2 is a plan of same.

Fig. 3 is a detail view of a portion of the delivery plate or board showing the slots in same through which the annular discs or collars project.

Fig. 4: is a section of a modified form of plate.

The machine is of known construction with the usual guide plate or board A over which. the slivers B pass to the calendering or pressing rollers C. A number of slots at are formed in. the forward end of the guide plate A, the distance between each pair of slots being equivalent to the width of a sliver so that there are as many surfaces between the slots as there are slivers.

A roller D is mounted below the guide plate A and a number of thin discs or collars (Z are mounted on this roller being spaced apart by washers or distance pieces d so that each disc 41 coincides with a slot a. The discs (Z project through the slots a as shown in Fig. 1 so that as each sliver passes over the guide plate A it is separated from adjacent slivers by the discs and the slivers will be evenly delivered to the calendering or pressing rollers C.

The roller D carrying the separating discs (Z is preferably driven by a gear wheel D on the end thereof so that the discs will rotate at approximately the same speed as the surface speed of the slivers B.

Vertical slots 6 are formed in the side members E of the guide plate A to form a bearing for a roller F (preferably formed of wood) which rests on the slivers B before passing between the separating discs (Z to keep them on the plate and prevent them from riding over the discs.

The slots (1 may be cut in the front of the plate A when it is formed from a single sheet of metal as in Fig. 1 or this front of the plate A may be severed and the slots formed therein and the two parts bolted or screwed together by the screw a as shown in Fig. 4.

It is found that a much more even lap will result from the separation of the slivers and that edges of the lap will more nearl approximate to a straight surface than with an ordinary machine and moreover that more ends can be employed in a single machine.

lVhat I claim as my invention and desire to protect by Letters Patent is A machine of the type referred to for forming laps in the preparation of cotton for spinning provided with calender rollers a slotted guide plate in the path of the slivers, extending to within a short distance of the nip of the calender rollers to which the slivers are delivered from the guide plate, a roller arranged below the delivery end of the guide plate and annular discs upon the roller to project upwards through the slots in the guide plate to separate the slivers whilst they are still passing over the guide plate and deliver them separately to the calender rollers.

In testimony whereof I have hereunto set my hand.

ARTHUR GARNETT RIDING. 

